RGB Of Life
From the HTML of the page:
This page [app] demonstrates Conway's Game of Life in what can be considered 24 dimensions. There are actually 24 simultaneous "games of life" being played on the board, one for each bit in a 24 bit RGB color value that is the background of the square. However, since we naturally think of white as the "dead" color and black as the "alive" color, the bits have been flipped in this demonstration so that 0 represents alive and 1 represents dead. Thus #fff, which is white, represents a cell that is completely dead, even though all of the bits are "on".
$ bundle install then simply do:
$ rackup config.ru
This will start a WEBrick server with a static Rack application serving the files. By default you can access the app at http://localhost:9292